Now, mixi is the most famous and biggest firm in Japan. And including this, the Social Networking Service (SNS) is not a no-charge business. In this business, users do not have to pay money to SNS. But, in this business, users are not clients, and also clients are not users. So, clients pay money. Now, SNS is a kind of desire development equipment and life designer. A strong point of business model of SNS is that is based on the powerfull context. So, In this article, I would like to say that we can see SNS as a context-driven business model based on the formation of tribes by the cooperative experience.